Onsite strength determination for early-opening decision making of high early strength concrete pavement  

作　　者：Katelyn Kosar Lucio Salles de Salles Naser Pourakbar Sharifi Julie Vandenbossche Lev Khazanovich 

机构地区：[1]Department of Civil and Environmental Engineering,University of Pittsburgh,Pittsburgh,PA 15261,USA [2]Department of Civil Engineering Technology,Environmental Management and Safety,Rochester Institute of Technology,Rochester,NY 14623,USA

出　　处：《Journal of Traffic and Transportation Engineering(English Edition)》2023年第2期291-303,共13页交通运输工程学报（英文版）

基　　金：supported by the by the University of Pittsburgh Center for Impactful Resilient Infrastructure Science and Engineering(IRISE);the University of Pittsburgh Anthony Gill Chair。

摘　　要：High early strength(HES)concrete pavements are commonly opened to traffic within the first 24 h after construction,making early-opening decisions critical for pavement quality and traffic operations.Currently,most state departments of transportation rely on compressive strength testing for early-opening decision making.However,there laboratory tests are labor intensive,costly and not always representative of field strength development.In this study,non-destructive testing(maturity and ultrasonic tomography)was explored for faster and reliable in-situ strength estimations.An experimental section constructed using HES concrete was routinely monitored using compressive testing,maturity,and ultrasonic tomography in the first 24 h after construction.The shear wave velocity,measured using ultrasonic tomography,was able to capture the strength-gain variability within a single slab and between different slabs due to the ability to monitor several locations in a short period of time.Maturity results were consistently conservative in the first 24 h of monitoring.Results show that both maturity testing and ultrasonic tomography are able to replace or add to conventional strength testing for HES concrete pavements to facilitate making the opening decision within the first 24 h.Ultrasonic tomography proved more beneficial as a result of the device's portability,increased speed of testing,and accurate estimations of HES concrete strength for the entire pavement length.

关 键 词：Road engineering High early strength concrete pavement Traffic early-opening STRENGTH MATURITY Ultrasonic tomography 

分 类 号：U416.216[交通运输工程—道路与铁道工程] U418.6